Spool-retarding means for tuft frames



Jan. 5 1926. 1,568,402

E. F. HATHAWAY SPOOL RETARDING MEANS FOR TUFT FRAMES Filed Jan. 29, 1923Patented Jan. 5, 1926.

EDGAR F. HATHAWAY, on EL EsmY, essecnusmms, ASSIGNOR TO- SHAWMUTENGINEERING COMPANY; 11 BqsToN, MssAqiU-smms, e CORPORATION OFMASSACHUSETTS.

' s QQLrBE TARPINZG-MEANB; E03; TUET FRAMES.

epg teetie ed Jewell-1 1323-. et l lie 615 5 9- To all it may concern;

Be it known h I ve t emewen a citizen ofthe Uiiited Stetesj, andresident f W e y,i h eeun y N fo k nd. Stat Massachusett have. inventedeel ein, n w and usef l lmpr v heh s h peel: Be erding Means er T tames, of w i h e ell ing e epe e i n- This inve ition relates to uftframe-1S uch asare'used in weevi gti ft fabricsof the hara er oAxmitieter a p t n the like, n s. h endedite. prov de. simple end eff vemeete to se mingthe esi e t nde io of the yem epe lles t retetes n, heuf ame o permit nwind ng ef t yarn e emf n rder to elivet he' p -forminfts '99 he fab i in t es: in operation.

eh el y sp aking the mpxe em nt een: s s niprovi ing e properlymenntedme e eh e brake mem er eeihh ned with tent-ins arrzingedtoyieldingly press said brakeme heir nteriet e el nga eme t W h h 'reteble epe in order eretetd th eme a d eate the. pr pe ra n he yarn asit is uhweu d f em th 'speeli use P o: vieien is als made or se ringehydesired degree of adjustmept to. secure the requisite d gree of e adation r, braking acti n, end in rde t prote t;the epringehd adjustin hine m h erfet' ng wit er eteh n he arn provision is" also made whereby}the pr e dite. adjust memb t iey belegit d insi e t el w'eerrier he feming the btldkbgl l of the t ftgf ren e. Theseend other aturesv f h n'enti-e will e blamed n" the follow ng s eeifieet e end will be definedin theela ms rete an exed.-

In he accompany ng raw ngs ,lheveillus: r t-ed eev e t rm of en riitienahd er: 1 g mentfemhedy n the ptine p es ei this invention, inwhich? F gu e 1 is ren elleve ien t e po io ef he spQ l-ee ry tuft.rame;

Figure? s en e v le etien e he ew viewed from the ir s id e with the hollow cer- 'ie h r hewn n ee ve etiet re 3 i e ron evatio pa ly n e e i ihowing t modified: e m' et t'ek ns 'heti m F er f s ehettiw se view athe s ine Viewed from the inside showing the carrier h nf l s see e i-Figu es 5 andfi are views similar to Figuites 3 and gt showing anothermodified eone u' tien and rra g men i The carrier bar 1, the suspensionbrake 2, with the gheip-engaging hook arm 3, and the po -supp t n ee 1 4n whi is mounted the journal of the spool 5 are s w embody ng the sameenetr e on o d fer nt terms t, t e i ve tien n m 219 pa t oihe, p s tmprov me I the p eeti efmy n enti e dits he; erm h h h F es 1 d Iprovide brake lever 8 Which intermeieite of. nds s at s piv e o the uttie e, in this. case direct y oppo te o th suspension brake 2;

At its spool-engaging end the brake arm Q-f the et-e 1 s pre erab y p ovded i h e firie eh-ped hQelQ wh ch may h ade Qt rewhideg fibre. or. anyu a le material- The power arm v 1 1 of the brake lever is engule rlydisposed i reletionto the workmg: r' n s ee oe tend a ee f n fa e -f hearrie he 1, e d s p r at t r ceive a heede l 2 Wh e s p s d through anapeigt re. 13 in the face of the h e lew e r er e end a i s at t S ethreaded end an adjustable nut let which is acc ssib e, h o g t e apertre 15 n he eppesi e e of he e lew a r e nd Wh h recei es he thrust o ehe i epr 1. e es; ie ei e y eld ngp l up n the e irm ll, wherebythebrake; ar of, the lever is yielgiingiy pressedintoifriotional-engagee m n ith" he p ip ry o h p o e pad lQ being, toall intents and purposes, a

Pert-ef h brake, e

n order. to'adjhett e t si f he br k membeiyageinst the spool thethrustinem- 1,4 may be turnedgineither direction by a screw-driver orother tool either to furt e compr ss the pri g e to ow it to expen e eany d i e degr kingp 'essure may-be brought to bear upon thefspoolywhile at the-same time the spring and the edjustable thrustmember being 1ooated'inside the hollow carrier bar, are pgoteetedagainst entanglement- With the tuft ya n pas ing irate the 49 91 to thenew;

individual tuft tubes (not herein shown as they are well known and formno part of the present invention).

In the form of the improvement shown in Figures and l an angular springlever 17 is provided whose brake arm or working member is provided witha friction shoe or pad 36 and whose power arm 17, angularly disposed tothe working arm, is located inside of the hollow carrier bar, theintermediate or fulcral portion of the lever being formed into one ormore pivotal eyes 18 which surround a fulcral pin 19 mounted just insidean aperture 20 formed in the top of the carrier bar, preferably a littlebeyond the attaching arms 6 and 7 ofthe suspension arm, thereby avoidingperforating of both the carrier bar and either.ofits attaching membersfor the passage and free working of the lever. An adjusting screw 21passes through the suspension arm 2 where it closes the end of thehollow carrier bar and carries a thrust member in the form of a nut 22to which one end of the helical spring 23 is attached, the other end ofthe spring being connected with the power arm 17 of the brakelever- Thecontractile tension of the spring serves to press the brake pad intofrictional engagement with the periphery of the spool. This pressurewill be varied according to the position of adjustment of thrust member22.

The form of the invention shown in Figs. 5 and 6, employs a movablespring-pressed brake member whose movement is in straight line insteadof in a circular arc.

In this form the carrier bar has opposite perforations located in theplane of the spool head and in substantially radial relationshipthereto. It comprises a hollow spring casing or plunger 25, on which ispreferably mounted a. friction pad 26 and is slotted along one side toreceive the laterally projecting guide lug or pin 28 of a thrust nut 27which is adjustably held at any desired position according to theadjustment of the adjusting screw 29 by the relatively stiff supportingspring 30. The brake tensioning spring 31 will exert a frictionalpressure between the movable brake member 26 which will vary accordingtothe position of the thrust member or nut 27. The spring serves to keepthe head of the adjusting screw always seated against the bottom wall ofthe carrier bar and is therefore stiffer than the spring 31. V

The form shown. in Figs. 36 have one advantage over that shown in Figs.1 and 2, since there is at all timessubstantially the same area offrictional contact between the brake and the spool, as the pads wear,due to the fact that inboth said forms the movement of the pads are in aplane longitudinal or axial of the spool.

An important feature characterizing all forms of the invention consistsin an arrangement which permits the use of a comparatively rigid orinflexible brake member in association with some form of tensioningspring, thereby avoiding the weakening and uncertainty of action ofbrakes characterized by flexible spring arms which are easily distortedin use.

lVhat I claim is:

1. In a tube frame for tuft weaving, the combination with atubularcarrier bar for externally supporting a series of tuft tubes, a yarnspool rotatably supported lengthwise of said carrier-bar, a movablebrake member arranged to press against a peripheral portion of saidspool, a brake-actuating spring mounted inside said tubular bar andoperatively combined with said brake to force the brake yieldinglyagainst the spool, a tensioning screw projecting through an apertureformed in an enclosing wall of said carrier-bar for connection with saidinterior spring and acting, by its adjustment, to vary the pressure ofthe brake against the spool, substantially as described.

2. In a tube frame for tuft weaving, the

combination of a hollow carrier-bar, a yarnspool rotatably mountedthereon, a pivotal brake arm arranged to swing between the spool rim andthe top of the carrier-bar, a brake-actuating spring located inside thecarrier bar and operatively combined with the brake to cause the braketo yieldingly press against the spool rim, substantially as described.3. In a tuft frame for weaving pile fabrics, the combination with asupporting frame and its rotatable yarn spool, of abrake arm pivotedintermediately of its ends to the spool-supp0rting frame to swing itinto braking engagement with said spool, and means for causing saidbrake arm to normally press against the spool in order to retardrotation thereof, substantially as described.

Fl. In a tuft frame for weaving pile fal rics, the combination with asupporting frame and its rotatable yarn spool, of a brake lever pivotedintermediately of its ends with one arm disposed to normally pressagainst said spool to exert frictional retardation thereon, and a springarranged to press against the other arm of said lever to maintain suchfrictional retardation, substantially as described.

5. In a tube frame for tuft weaving, the combination with a carrier-barand its rotatable yarn spool, of a movable brake member arranged tofrictionally engage a head of the yarn-spool to retard rotation of thespool, an actuating spring combined with said brake member to cause thebrake member toyieldingly press against the spool head, aspring-engaging threaded nut and an adjusting screw therefor, said. nutbeing adjustable by means of said screw to vary the position of the nut,thereby varying the pressure of the spring-actuated brake against theyarn-spool.

6. In a tuft frame for weaving, the combination of a hollow carrier barand its suspension bracket secured thereto, a rotatable yarn spool, amovable brake member arranged to frictionally engage said yarn spool, atensioning spring arranged to yield ingly press the brake member intofrictional engagement with said spool,'and an adjustable thrust memberby which the frictional pressure is varied and an adjusting screw havingthreaded engagement with said thrust member and projecting through awall of the carrier-bar, said spring and said thrust member beingmounted inside the carrier bar, substantially as described.

7. In a tuft tube frame for weaving, the combination of a longitudinalcarrier bar and its associated yarn spool, of a movable brake member ofsubstantially rigid material and a separate spring arranged toyieldingly press said rigid brake member into retarding contact againsta portion of the spool, substantially as described.

In witness whereof, I have subscribed the above specification.

EDGAR F. HATHAVVAY.

